A detailed investigation has concluded that a software malfunction was responsible for the failure of the Lunar Trailblazer mission, a $72 million satellite developed to study water on the Moon. The spacecraft, launched from Kennedy Space Center, lost contact with ground controllers shortly after reaching space, bringing its scientific mission to an abrupt halt.
The findings come from an internal review conducted after the mission failed. A report describing the investigation was later obtained by NPR through a Freedom of Information Act request. According to the document, the spacecraft’s onboard software incorrectly directed its solar panels shortly after deployment.
Instead of facing the Sun to generate power, the solar panels were oriented 180 degrees in the opposite direction. Because solar panels must face sunlight to produce electricity, this mistake severely limited the spacecraft’s power supply and prevented it from functioning normally.
The issue surfaced almost immediately after launch, effectively disabling the spacecraft before it could begin its planned scientific observations. Engineers were unable to restore stable communication or regain control of the satellite.
Mission Designed to Study Lunar Water
The mission, led by NASA, was created to help scientists better understand how water exists on the Moon. Although researchers have already confirmed that water is present in some lunar regions—particularly in permanently shadowed craters near the poles—many details about its distribution and form remain uncertain.
Scientists are especially interested in whether the water exists primarily as ice deposits, bound within minerals, or as molecules interacting with the lunar surface. Understanding how these forms change over time and how they respond to temperature differences across the Moon could provide valuable insights into the lunar environment.
Lunar Trailblazer was equipped with advanced scientific instruments designed to map water across the Moon’s surface. By examining how water interacts with lunar soil and how it shifts in response to sunlight and temperature variations, the spacecraft was expected to provide one of the most detailed surveys of lunar water ever conducted.
This information could play an important role in future exploration efforts, particularly for programs like Artemis program, which aims to send astronauts back to the Moon and eventually establish a long-term human presence there.
Water is considered one of the most valuable resources for sustained lunar exploration. It can be used for drinking, generating oxygen, and even producing rocket fuel through chemical processing.
Launch and Early Operations
Lunar Trailblazer launched in February 2025 as part of the IM-2 mission operated by Intuitive Machines. The spacecraft traveled to space aboard a SpaceX Falcon 9 rocket.
Shortly after liftoff, the spacecraft separated from the rocket as planned, roughly 48 minutes into the mission. Initial communication between the satellite and mission controllers was successfully established, suggesting that the deployment process had gone smoothly.
However, the situation quickly deteriorated.
Within a day of launch, communication with the spacecraft was unexpectedly lost. Engineers monitoring the mission were suddenly unable to receive signals or send commands to the satellite.
Without consistent communication, the mission team had limited ability to determine exactly what had gone wrong.
Months of Attempts to Recover the Spacecraft
Following the loss of contact, engineers spent several months trying to reestablish communication with the spacecraft. The team explored multiple recovery strategies, including sending repeated signals and analyzing whatever limited telemetry data remained available.
Despite these efforts, the spacecraft never responded.
Without two-way communication, mission operators could not diagnose the satellite’s condition or make adjustments to its trajectory or systems. The inability to control the spacecraft also meant that its orientation and power management systems could not be corrected.
As weeks turned into months, hopes of recovering the spacecraft gradually faded.
By July 2025, recovery attempts had effectively stalled. The mission was formally declared over in August 2025 after NASA concluded that the satellite could no longer be brought back into operation.
Investigation Highlights Testing Gaps
The spacecraft itself was designed and built by Lockheed Martin, which had been selected by NASA to develop the mission in 2020.
The review panel determined that one of the major contributing factors to the failure was insufficient testing before launch. Investigators found that the solar array phasing system—which controls how solar panels align with the Sun—had not undergone a full end-to-end test under realistic mission conditions.
According to the report, such a test would likely have revealed the faulty flight software responsible for directing the panels away from the Sun.
If engineers had identified the issue earlier, they could have corrected the software before launch and avoided the malfunction that ultimately doomed the mission.
Because the solar panels could not properly capture sunlight, the spacecraft struggled to generate enough electrical power to maintain operations. This likely contributed to the loss of communication shortly after deployment.
Low-Cost Missions Carry Higher Risk
Although the failure was a setback, NASA officials have pointed out that Lunar Trailblazer was designed as a relatively low-cost mission.
The spacecraft fell into what NASA categorizes as a Class D mission. Projects in this category are intentionally designed to be less expensive and faster to develop than large flagship missions. In exchange for lower costs and shorter development timelines, these missions often accept higher levels of technical risk.
While this approach allows more missions to be launched within limited budgets, it also increases the likelihood of failures.
Even with the mission’s premature end, the development team completed several significant milestones during the spacecraft’s construction and testing phases. These included overcoming engineering challenges such as replacing the spacecraft’s main engine and conducting rigorous vibration tests to ensure it could withstand launch conditions.
NASA officials say the experience gained during the project will help refine procedures and improve reliability for future missions.
Scientific Opportunities Lost
The failure of Lunar Trailblazer meant that scientists lost an important opportunity to gather new data about water on the Moon.
The spacecraft carried two specialized instruments designed to study the lunar surface in unprecedented detail. These instruments would have measured how water molecules interact with lunar minerals and how temperature variations influence their distribution across different regions.
Researchers had hoped the mission would reveal how water moves and changes over time on the Moon’s surface.
Such knowledge would have helped scientists better understand the Moon’s geology and its potential to support long-term human exploration.
Although the spacecraft itself did not survive long enough to complete its mission, some of its technology will still contribute to future lunar research.
One of the mission’s key instruments—the Compact Imaging Spectrometer for the Moon (UCIS-Moon)—was developed at the NASA Jet Propulsion Laboratory.
NASA has already selected an identical version of the spectrometer for a future orbital mission. This means researchers will still have an opportunity to collect many of the measurements originally planned for Lunar Trailblazer.
The continued use of this instrument ensures that the scientific goals behind the mission may still be pursued in upcoming lunar exploration efforts.
